刘星将一块重2N的橡皮泥放入水中后橡皮泥立即沉入水底；他取出橡皮泥将其捏成船状再放入水中，“泥船”却漂浮在水面上，他是利用了______方法来增大浮力的，此时“泥船”所受的浮力为______N．
橡皮泥捏成船状放入水中时，排开水的体积变大，由F浮=ρ水gv排知道，橡皮泥受到的浮力变大；
∵“泥船”漂浮，
∴“泥船”受到的浮力：
F浮=G=2N．
故答案为：增大排开液体的体积，2．
| 选词填空。 从方框里选择正确的单词，并用其正确的形式填空。 | |
2. The stars came out as soon as______ fell. 3. We'll have an opportunity to ______views tomorrow. 4. The house itself is not ______ to my mind, but I like its environment. 5. They have two ______ in their house. 6. He hanged himself in______ after his wife died. 7. I say, waiter, the soup is too ______. 8.The _ decision came after weeks of deliberation. 9. Poetry always loses something in _______. 10. He was touched by the _______ of their welcome. |